Dear Mr. Layog,
Thank you for posting your request on History Hub!
Military service personnel files for members of the Philippines Scouts are located at NARA's National Personnel Records Center (NRPC), (Military Personnel Records), 1 Archives Drive, St. Louis, MO 63138-1002. To request these records, please mail a completed GSA Standard Form 180 to NPRC. These files do not have copies of birth certificates. For information about Philippine birth certificates, please contact the Philippine Statistics Authority (PSA).
We hope this information is helpful.